Before Jaco had a rep for producing super comfortable and lightweight shorts, they were hard at work developing top notch materials and the perfect martial arts fit. The result? High-end shorts with impressive features and an excellent patent-pending waist-tightening system. Their main material, the STR-X fabric, was perfected by balancing breathability and flexibility. Built from 90% polyester and 10% spandex, this signature material is one of the most advanced shorts materials to hit the martial arts market. Not only does it stretch to preserve the seams from unnecessary stress, but it holds its shape over time, avoiding any stretched-out baggy areas. The engineered fabric boasts impressive breathability and moisture-wicking, both important traits for hot summers and long training sessions.
The patent-pending waist closure system can be easily adjusted without scrunching up the rear waistband fabric, creating a reliable "no-slip" fit. The soft material used to back the hook-and-loop system is slightly padded, easily preventing any chaffing from the closure itself.
Another noteworthy feature of the advanced Tenacity edition is the hidden internal stretch pocket. Instead of inside the waistband as you'll usually find, Jaco was clever enough to situate the pocket in a much more easily accessible spot: inside the bottom of the shorts' hem. Since the pocket faces upward and has a fold-over design, it holds items securely without requiring you to untie your shorts in order to access your mouthguard, ID card, etc.